import React, { Component } from 'react'
import PropTypes from 'prop-types'
import './index.css'
import { nanoid } from 'nanoid'

export default class Header extends Component {

  static propTypes = {
    addTodo:PropTypes.func.isRequired,
  }

  handleKeyUp = (event) => {
    const { keyCode, target } = event;
    if (keyCode !== 13) return;
    if (target.value.trim() === '') {
      console.log('输入不能为空');
      return;
    }
    const todo = { id: nanoid(), name: target.value, isCheck: false };
    this.props.addTodo(todo);
    target.value = '';
  }

  render() {
    return (
      <div className="todo-header">
        <input onKeyUp={this.handleKeyUp} type="text" placeholder="请输入你的任务名称，按回车键确认" />
      </div>
    )
  }
}
